A foldable horizontal blade device for a wind turbine

Abstract

This application belongs to the field of wind turbine technology, and particularly relates to a foldable horizontal blade device for wind turbines, including a rotating hinge base. The rotating hinge base includes a vertical shaft, on which multiple hinge seats are arranged. All the hinge seats are evenly arranged around the central axis of the vertical shaft. Blades are provided on the hinge seats and hinged to the hinge seats. A column is provided at the upper end of the rotating hinge base, and a fixed pulley group is provided at the upper end of the column. A rope winding and unwinding device is provided inside the column. A lifting rope is provided on the drive rod of the rope winding and unwinding device. The lifting rope passes through the fixed pulleys on the fixed pulley group and is connected to the blade. This application uses the connection between the blade and the rotating hinge base as the fulcrum, and uses the rope winding and unwinding device and the lifting rope to lift the blade, so that the blade can overcome its own weight and the blade length can be made longer. The angle between the blade and the horizontal plane can be changed, so as to enhance the wind energy capture capability.

Description

Technical Field

[0001] This application belongs to the field of wind turbine technology, and particularly relates to a foldable horizontal blade device for wind turbines. Background Technology

[0002] Horizontal blade wind turbines can capture weaker wind energy more stably, and the bearings used on wind turbines can withstand less stress. However, the overall length of the blades results in a greater weight. The only connection point of the blades is at the front end, and the increased windward area at the rear end of the blades leads to an increase in weight at the rear end, causing blade instability. In addition, the fixed angle of the blades results in poor wind capture effect. These factors have led to the limited application of horizontal blade wind turbines. Utility Model Content

[0003] In order to solve the above problems, this application provides a foldable horizontal blade device for wind turbine generators.

[0004] The purpose of this application is to provide a foldable horizontal blade device for wind turbines, which uses the connection between the blade and the rotating hinge as the fulcrum, and uses a rope retraction device and a suspension rope to suspend the blade, so that the blade can overcome its own weight and the blade length can be made longer. The angle between the blade and the horizontal plane can be changed, so that the wind energy capture capability is stronger.

[0005] To achieve the purpose of this application, the technical solution of this application is as follows:

[0006] A foldable horizontal blade device for a wind turbine includes a rotary hinge base, which includes a vertical shaft. Multiple hinge seats are arranged on the vertical shaft, and all the hinge seats are evenly arranged around the central axis of the vertical shaft. Blades are provided on the hinge seats and are hinged to the hinge seats. A column is provided at the upper end of the rotary hinge base, and a fixed pulley block is provided at the upper end of the column. A rope winding and unwinding device is provided inside the column. A suspension rope is provided on the drive rod of the rope winding and unwinding device. The suspension rope passes through the fixed pulleys on the fixed pulley block and is connected to the blades.

[0007] Furthermore, the hinge seat includes two spaced partitions, two spaced fixed plates are arranged between the partitions, a first hinge shaft is arranged between the fixed plates, a second hinge shaft is arranged between the partitions and the fixed plates, and a hinge mating seat is provided at one end of the blade near the hinge seat. The hinge mating seat includes a first hinge plate and a second hinge plate. A first through hole is provided on the first hinge plate, a second through hole is provided on the second hinge plate, the first hinge shaft passes through the first through hole, and the second hinge shaft passes through the second through hole.

[0008] Furthermore, a top plate is provided at the upper end of the vertical shaft, a bottom plate is provided at the lower end of the vertical shaft, a column is provided on the top plate, a partition is provided between the top plate and the bottom plate, and a fixing plate is provided on the bottom plate.

[0009] Furthermore, reinforcing plates are installed between the partitions.

[0010] Furthermore, the diameter of the first hinge shaft is larger than the diameter of the second hinge shaft.

[0011] Furthermore, the outer perimeter of the column is provided with a protruding plate, and a protective cover is provided on the protruding plate.

[0012] Furthermore, the protective cover includes a support rod, which is fixed to the convex plate, and a protective baffle is provided at the upper end of the support rod, which is arranged above the fixed pulley block.

[0013] Furthermore, the rope winding and unwinding device includes hydraulic cylinders in the same number as the blades, with the hydraulic cylinders evenly arranged around the central axis of the column, and the drive rod being the piston rod of the hydraulic cylinder.

[0014] Furthermore, a lightning rod is installed at the top of the protective cover.

[0015] Furthermore, this application also includes an anemometer, which is arranged below the rotating hinge base.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] 1. The rotary hinge seat of this application is hinged to the hinge mating seat on the blade. The column of the rotary hinge seat has a fixed pulley group and a rope winding and unwinding device inside the column. The rope winding and unwinding device is connected to the blade through a suspension rope. By pulling the blade and balancing with the weight of the blade, the angle between the blade and the horizontal plane changes, thereby improving the wind energy capture capability.

[0018] 2. This application uses a sling to suspend the blade, with the connection between the blade and the rotating hinge as the fulcrum, so that the blade can overcome its own weight and the blade length can be made longer, resulting in a stronger wind energy capture capability. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0020] Figure 1 This is a schematic diagram of the overall structure of the wind turbine generator of this application;

[0021] Figure 2 This is a schematic diagram of one state of the wind turbine generator of this application;

[0022] Figure 3 This is a schematic diagram of another state of the wind turbine generator of this application;

[0023] Figure 4 This is a schematic diagram of a wind turbine generator according to this application;

[0024] Figure 5 This is a schematic diagram of the structure of the rotating hinge seat and the column in this application;

[0025] Figure 6 This is a schematic diagram of the structure of the column with a protective cover and a lightning rod in this application;

[0026] Figure 7 This is a schematic diagram of the overall structure of the blade in this application.

[0027] In the picture:

[0028] 10. Blade; 20. Rotary hinge seat; 30. Suspension rope; 40. Modular tower; 50. Anemometer; 60. Column; 70. Fixed pulley block; 80. Protective cover; 90. Lightning rod; 100. Pull-down rope; 110. Telescopic spring.

[0029] 11. Blade body; 12. Hinge fitting seat; 13. First lifting ring; 14. Second lifting ring;

[0030] 21. Top plate, 22. Bottom plate, 23. Partition, 24. Fixing plate. Detailed Implementation

[0031] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] In this application, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this application and do not specifically refer to any part or element in this application. They should not be construed as limiting this application.

[0034] Example 1

[0035] This embodiment is a foldable horizontal blade device for a wind turbine. The blade 10 is mounted on the horizontal blade wind turbine. The blade 10 is cooperated with the rotating hinge seat 20 and the rope winding and unwinding device mounted on the rotating hinge seat 20. The rope winding and unwinding device lifts the blade 10, and the rotating hinge seat 20 supports the front end of the blade 10.

[0036] Specifically, the horizontal blade wind turbine includes a modular tower 40, with a rotating hinge seat 20 that mates with the blade 10 installed at the upper end of the modular tower 40. A column 60 is installed at the upper end of the rotating hinge seat 20, and a fixed pulley block 70 is installed at the upper end of the column 60. A rope winding and unwinding device is installed inside the column 60, and a hoisting rope 30 is installed on the drive rod of the rope winding and unwinding device. The hoisting rope 30 passes through the fixed pulleys on the fixed pulley block 70 and is connected to the blade 10, so that the blade 10 can be lifted by pulling the rope.

[0037] As a device enabling the blade 10 to change its angle, the foldable horizontal blade device of this embodiment includes a rotary hinge seat 20. Specifically, from the structure of the rotary hinge seat 20, the rotary hinge seat 20 includes a vertical shaft, on which multiple hinge seats are provided. For example, in this embodiment, the number of hinge seats is three. All the hinge seats are evenly arranged around the central axis of the vertical shaft. The blade 10 is mounted on the hinge seat and hinged to it. In this embodiment, a single hinge seat includes two spaced partition plates 23, and a reinforcing plate is installed between the partition plates 23. To enhance the stability and strength of the overall structure of the hinge seat, two spaced fixing plates 24 are arranged between the partition plates 23. A disc-shaped top plate 21 is located at the upper end of the vertical shaft, and a disc-shaped bottom plate 22 is located at the lower end of the vertical shaft. The column 60 is fixed to the top plate 21 by bolts. The coupling connecting the speed increaser and the generator, and the slip ring are connected to the bottom plate 22. The partition plate 23 is arranged between the top plate 21 and the bottom plate 22. The upper end of the partition plate 23 is fixedly connected to the top plate 21, and the lower end of the partition plate 23 is fixedly connected to the bottom plate 22. The fixing plate 24 is fixed to the bottom plate 22.

[0038] A first hinge shaft is installed between the fixed plates 24, and a second hinge shaft is installed between the partition plate 23 and the fixed plate 24. In terms of size, the diameter of the first hinge shaft is larger than the diameter of the second hinge shaft. Correspondingly, the end of the blade 10 near the hinge seat has a hinge mating seat 12. The hinge mating seat 12 includes a first hinge plate and a second hinge plate. A first through hole is opened on the first hinge plate, and a second through hole is opened on the second hinge plate. The first hinge shaft passes through the first through hole, and the second hinge shaft passes through the second through hole.

[0039] The blade 10 in this embodiment is a lifting blade 10. Specifically, the blade 10 includes a blade body 11. The windward area of ​​the front end of the blade body 11 is smaller than the windward area of ​​the rear end of the blade body 11, which increases the windward area of ​​the rear end of the blade body 11, thereby enhancing the wind-catching ability. The angle between the lower end of the blade body 11 and the horizontal plane is smaller than the angle between the upper end of the horizontal blade and the horizontal plane, so that when the blade 10 rotates, it cooperates with the airflow to form a lifting structure. The blade 10 has an upward lift force, which serves as an auxiliary force to overcome the weight of the blade 10, reducing the tension of the suspension rope 30. The blade 10 has an upward tendency to move, reducing the impact of the blade 10's own weight.

[0040] A first lifting ring 13 is installed at the rear end of the blade body 11, and a second lifting ring 14 is installed at the front end of the blade body 11. The end of the blade 10 closest to the rotating hinge seat 20 is the front end of the blade 10 or the blade body 11, and the end of the blade 10 furthest from the rotating hinge seat 20 is the rear end of the blade 10 or the blade body 11. When the blade 10 rotates, the rotating body centered on the rotating hinge seat 20 rotates together with the rotating hinge seat 20, serving as the parameter for the change of the blade 10 angle. In this embodiment, an anemometer 50 is installed on the wind turbine. The anemometer 50 is arranged below the rotating hinge seat 20. Its installation position should avoid the influence of the rotation of the blade 10 on the anemometer 50. If necessary, a wind deflector can be installed to reduce the influence of the rotation of the blade 10 on the anemometer 50. The anemometer 50 detects the wind volume and wind speed, and can also detect the wind direction.

[0041] In this embodiment, a first wear-resistant sleeve is installed in the first through hole, and a second wear-resistant sleeve is installed in the second through hole. The first hinge shaft passes through the first wear-resistant sleeve, and the second hinge shaft passes through the second wear-resistant sleeve. The use of the wear-resistant sleeve reduces the friction and wear between the hinge plate and the rotating hinge seat 20. Furthermore, this application uses the fixing plate 24 and the partition plate 23 to block the first hinge plate and the second hinge plate, preventing the blade 10 from undergoing lateral displacement.

[0042] As a protective structure for the top surface of the column 60, a protruding plate is fixed to the outer periphery of the column 60 in this embodiment. A protective cover 80 is installed on the protruding plate to cover the top of the column 60. Specifically, the protective cover 80 in this embodiment includes a support rod, which is fixed to the protruding plate. In this embodiment, there are multiple support rods, and the multiple support rods are evenly arranged around the central axis of the column 60. A protective baffle is installed on the upper end of the support rod. The protective baffle is arranged above the fixed pulley block 70 and is disc-shaped. A lightning rod 90 is installed on the upper end of the protective cover 80.

[0043] In this embodiment, a pull-down rope 100 is also installed on the modular tower 40. The other end of the pull-down rope 100 is connected to the lower end of the blade 10. A telescopic spring 110 is also installed on the pull-down rope 100. The telescopic spring 110 can adapt to the angle change of the blade 10 and ensure the stability of the blade 10's rotation. In this embodiment, a telescopic spring 110 is installed on the suspension rope 30. The deformation of the telescopic spring 110 offsets the length change of the suspension rope when pulling the blade 10, so that the telescopic spring 110 deforms first and then pulls the blade 10. When the blade 10 undergoes an angle change, the telescopic spring 110 buffers it and prevents the blade 10 from being rigidly pulled. In addition, adjacent blades 10 can be connected together to form a whole by connecting ropes. Telescopic springs 110 can also be installed on the connecting ropes.

[0044] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0045] While the specific embodiments of this application have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this application. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this application are still within the scope of protection of this application.

Claims

1. A foldable horizontal blade device for a wind turbine generator, characterized in that, Including rotating hinge base; The rotary hinge seat includes a vertical shaft, on which multiple hinge seats are provided. All the hinge seats are evenly arranged around the central axis of the vertical shaft, and each hinge seat is provided with a blade that is hinged to the hinge seat. The upper end of the rotary hinge seat is provided with a column, the upper end of the column is provided with a fixed pulley group, a rope winding and releasing device is provided inside the column, a suspension rope is provided on the drive rod of the rope winding and releasing device, the suspension rope passes through the fixed pulley on the fixed pulley group and is connected to the blade.

2. The foldable horizontal blade device for a wind turbine generator as described in claim 1, characterized in that: The hinge seat includes two spaced partitions, two spaced fixed plates are arranged between the partitions, a first hinge shaft is arranged between the fixed plates, and a second hinge shaft is arranged between the partitions and the fixed plates. The blade is provided with a hinge mating seat at one end near the hinge seat. The hinge mating seat includes a first hinge plate and a second hinge plate. The first hinge plate is provided with a first through hole, and the second hinge plate is provided with a second through hole. The first hinge shaft passes through the first through hole, and the second hinge shaft passes through the second through hole.

3. The foldable horizontal blade device for a wind turbine generator as described in claim 2, characterized in that: The upper end of the vertical shaft is provided with a top plate, the lower end of the vertical shaft is provided with a bottom plate, the column is provided on the top plate, the partition is provided between the top plate and the bottom plate, and the fixing plate is provided on the bottom plate.

4. The foldable horizontal blade device for a wind turbine generator as described in claim 2, characterized in that: A reinforcing plate is provided between the partitions.

5. A foldable horizontal blade device for a wind turbine generator as described in claim 2, characterized in that: The diameter of the first hinge shaft is larger than the diameter of the second hinge shaft.

6. The foldable horizontal blade device for a wind turbine generator as described in claim 1, characterized in that: The outer periphery of the column is provided with a protruding plate, and a protective cover is provided on the protruding plate.

7. A foldable horizontal blade device for a wind turbine generator as described in claim 6, characterized in that: The protective cover includes a support rod, which is fixed to the convex plate. A protective baffle is provided at the upper end of the support rod, and the protective baffle is arranged above the fixed pulley block.

8. A foldable horizontal blade device for a wind turbine generator as described in claim 1, characterized in that: The rope winding and unwinding device includes hydraulic cylinders in the same number as the blades. The hydraulic cylinders are evenly arranged around the central axis of the column, and the driving rod is the piston rod of the hydraulic cylinder.

9. A foldable horizontal blade device for a wind turbine generator as described in claim 6, characterized in that: A lightning rod is installed at the upper end of the protective cover.

10. A foldable horizontal blade device for a wind turbine generator as described in claim 1, characterized in that: It also includes an anemometer, which is arranged below the rotating hinge base.

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